Altera_Forum
Honored Contributor
Honored Contributorchanging pll settings
I need to try a series of different phase delay settings on an internal (cyclone) pll. Do I have to re-synth and fit every time or is there a shortcut.
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Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- Tools -> Chip Editor. You can then double-click on the PLL, which will open the resource property editor, and change its settings. Save it off when you close the floorplanner(it should prompt you). Then run Processing -> Start -> Assembler to create a new programming file, if that's what you want. You could rerun the Timing Analyzer to see what the new timing analysis looks like, the EDA Netlist writer for a new simulation model, etc. It can be difficult to "find" the PLL in the chip-editor view. Another trick is to right-click it in the Project Navigator Hierarchy(top-left window) and Locate -> Chip Planner. --- Quote End --- I see I can just highlight the PLL block in the bdf and then Locate->Resource Property Editor. Although the table of properties does show the phase delay, it isn't an editable field. I can only change the phase by changing the 'Initial' and 'VCO Tap' entries, and these do not give anywhere near the fine tuning or the range that the MegaWizard GUI does.
